This week鈥檚 new questions
How do humans living in the Arctic cope with no sun in winter? What happens to make people short or long-sighted?
Regulars
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How do humans living in the Arctic cope with no sun in winter? What happens to make people short or long-sighted?
How tight are the lids on food jars supposed to be, and what happens when dark matter falls into a black hole? Send us your thoughts